Rod for use in cold permanent waving

ABSTRACT

A rod for use in the cold permanent waving having a substantially hollow cylindrical shape as a whole. The rod has a plurality of slots to accommodate a fastening pin. While winding the hair thereon, the rod is fastened to the hair by the fastening pin whose leg passes through the slots.

United States Patent [191 Sato [ Oct. 21, 1975 ROD FOR USE IN COLD PERMANENT WAVING [75] Inventor:

[73] Assignee: Arimino Chemical Co. Ltd., Tokyo,

Japan [22] Filed: July 5, 1974 [21] Appl. No.: 485,947

Nakaya Sato, Tokorozawa, Japan [30] Foreign Application Priority Data Feb. 9, 1973 Japan 48-16681 [52] US. Cl. 132/40 [51] Int. Cl. A45D 2/00 [58] Field of Search 132/40, 42, 9, 41, 52,

[56] References Cited UNITED STATES PATENTS 2,337,786 12/1943 Wasserman 132/52 2,396,782 3/1946 Grant 132/42 R 2,905,186 9/1959 Pfalzgraf 132/33 R 3,016,909 l/l962 Schrock 3,439,686 4/1969 Klink 3,802,443 4/1974 Morane 132/39 Primary Examiner-G. E. McNeil] Attorney, Agent, or Firm-Sherman & Shalloway [5 7 ABSTRACT A rod for use in the cold permanent waving having a substantially hollow cylindrical shape as a whole. The rod has a plurality of slots to accommodate a fastening pin. While winding the hair thereon, the rod is fastened to the hair by the fastening pin whose leg passes through the slots.

9 Claims, 8 Drawing Figures U.S. Patent 0a. 21, 1975 Sheet 1 of 2 U.S. Patent Oct. 21', 1975 Sheet2of2 3,913,593

ROD FOR USE IN COLD PERMANENT WAVING BACKGROUND OF THE INVENTION This invention relates to a rod for use in a cold permanent wave treatment and more particularly to a cold permanent wave rod which pins up the hair tightly with its accompanying fastening pin without using a rubber band.

In setting a cold permanent wave by the use of a known cold permanent wave rod, it is a customary practice in the art of beauty culture to wind the hair onto the rod and fasten it by stretching a rubber band on projections provided at both ends of the rod. On account of the pressure applied to the surface of the hair by the stretching rubber band, there occur oftentimes splitting and cutting of hairs and spoilages of branching hairs. Cutting of hairs is frequently observed around the top of the head in a belt zone extending along the rod at about 5 mm from the fastening point by the stretching rubber band. Similarly spoilages and cutting of hairs very often occur in the practice of treatment by unskilled beautyculturists, or when the hair is wound up on the rod in a thicker bundle.

On the other hand, trends in the last two years show that tastes of ladies are inclining towards a tender wave of hairs. In order to set the hair in a tenderer wave, the hair should be wound on the rod in a thicker bundle. Here again, spoilages and cutting of hairs become all the more serious problems for those concerned in the art.

Further, fastening of hairs by stretching a rubber band to both projections of the rod is rather timeconsuming. As is known, setting of hair waves in a cold permanent wave employs a chemical action, and winding of the hair on the rod should therefore be made as rapidly as possible. Conventional rods are not at all satisfactory in this point, either.

Accordingly, it is a primary object of the present invention to provide a cold permanent wave rod which is free from conventional defects and which can be very easily and tightly fastened to the hair by its accompanying fastening pin without causing spoilages and cutting of hairs.

It is another object of the present invention to provide a cold permanent wave rod which, apart from the abovedescribed features, makes it possible to impregnate solutions used in a waving treatment into the hair adequately as desired.

It is a further object of the present invention to provide a combination of a cold permanent wave rod having the abovementioned features with a fastening pin that fastens the rod to the hair tightly while the hair is wound on the rod.

These objects of the present invention together with others not specifically mentioned can be accomplished by a cold permanent wave rod that has a substantially hollow cylindrical shape as a whole and a plurality of slots bored in the proximity of both tips thereof to accommodate a fastening pin therethrough.

BRIEF DESCRIPTION OF THE DRAWING The objects and advantages of the present invention will be apparent from the detailed description of the invention to follow in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view showing a cold permanent wave rod of the present invention,

FIG. 2 is a plan view of a fastening pin to be used together with a cold permanent wave rod of the present invention,

FIG. 3 is a side view showing the engagement of the rod and the fastening pin,

FIG. 4 is an operational representation showing the rod wound on the hair and fastened thereto by the fastening pin, and

FIGS. 5 through 8 illustrate modified embodiments of the rod in accordance with this invention.

Throughout FIGS. 1 8, like numerals are used to identify like elements.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Now the present invention will be described more in detail by referring to the accompanying drawings which illustrate some preferred embodiments of the invention.

FIG. 1 is a perspective view showinga cold permanent wave rod 1 in accordance with the present invention. The rod may have a shape that is perfectly cylindrical, but such a shape is not advisable. If the rod is perfectly cylindrical, hairs tend to deviate from the center of the rod towards both tips during the winding procedure, and the rod sometimes fails to be fastened tightly to the hair. Therefore, the rod 1 should preferably be shaped out in a loose bow whose diameter at both tips gradually lessens towards the center to match the curvature of the head.

The rod 1 further has protrusions 3 on the surface of both tips 2 so as to facilitate the winding procedure and ensure a tight fastening of the rod 1 to the hair as well.

In the proximity of the two tips 2, a plurality of slots 4 are bored to accommodate a fastening pin 5 (see FIG. 2). The shape and size of the slots 4 are primarily determined in accordance with those of the fastening pin 5 to be used, but have a rectangler shape preferably a bit wider than the width of the leg of the fastening pin 5 as shown in FIG. 1. This arrangement ensures an easier passing of the pin during the practice of winding the hair and permits an allowance to the inclination angle of the pin to the head.

It is advisable also to bore about 4 6 slots in the proximity of each tip of the rod. The number of slots along with its size ensures an easier mounting of the pin, and also permits adequate allowance of the inclination angle of the pin to the head as described above.

Any material can be used to make up the rod so long as it is not attacked by the chemicals used generally in the cold permanent wave treatment (generally, reducing agents as a primary solution to wave the hair and oxidizing solution as a secondary solution to set the resulting wave).

Synthetic resins are most preferred materials as they are light in weight and have an excellent appearance.

A typical structure of the fastening pin 5 is shown in FIG. 2 which is used to fasten the rod to the hair when the hair is wound up on the rod. This fastening pin 5 has a neck 6 and a leg 7, the latter passing through the slot 4 of the rod 1 up to the head. Around the root of the leg 7, there is provided a dent 8 which engages the tip 2 of the rod 1 by the elasticity of the neck 6 of the fastening pin 5, as shown in FIG. 3, and associates the fastening pin 5 with the rod 1. Like materials may be used for the fastening pin 5 as in the rod 1.

FIG. 4 illustrates a mode of operation of the rod 1 which keeps the hair wound and is fastened to the head by the fastening pin 5. In FIG. 4, a bundle of hair 9 is wound on the rod 1, and the fastening pin 5 is implanted to the hair through the slot 4 of the rod 1. The tip of the fastening pin 5 comes close to the skin of the head. The tip 10 functions as a fulcrum point to prevent the rod 1 from reversing, i.e., rewinding of the hair accidentally. In this way, the rod 1 is fastened to the hair by means of a lever-and-fulcrum function of the fastening pin 5 to always assure a firm fastening. One fastening pin affords a perfect fastening of one rod.

As will be apparent from the above description, the cold permanent wave rod in accordance with the present invention does not use a rubber band that is required conventionally; hence, the rod of this invention enables rapid winding of the hair, irrespective of the skillfulness of beauticians, without causing any spoilages and cutting of the hair during the treatment. In practice, the use of the rod of this invention together with one fastening pin reduces the winding time to about one third of customary rods.

FIGS. 5 through 8'illustrate some modified embodiments of rods in accordance with the present invention.

A cold permanent wave treatment most commonly practiced involves the steps of spraying a primary treating solution known per se to the hair, winding the hair on a rod to effect waving of the hair chemically and then spraying a secondary treating solution known per se while the hair is wound up on the rod so as to permanently set the waves formed by the preceeding treatment.

Since the spraying of the secondary solution is made while the hair is wound up on the rod, the secondary solution often does not penetrate adequately from the surface of the hair bundle deep into the internal hairs because of the presence of the rod. It is advisable, therefore, to bore a plurality of holes at the center of the rod body so that the secondary solution penetrates adequately into the hair, specifically to the internal hair in the bundle, through the holes inside the hollow rod.

The rod shown in FIG. 5 has a pair of long openings 12 provided at the center of the rod body, facing each other in the axial of the rod. Naturally, the secondary solution in this embodiment passes through the long openings 12 and penetrates into the internal hair.

The rod shown in FIG. 6 has a plurality of holes 13 at the center of the rod body.

FIG. 7 shows another modified rod in which the slots for the fastening pin are extended to the center of the rod body from both tips to form long slots 14. The slot 14 in this embodiment functions as a slot for the fastening pin as well as an opening to permit passage of the solution.

. Likewise in FIG. 8 is shown a further modified embodiment of the rod in which a number of pores are provided over the entire rod body. Pores located near both tips of the rod function as a slot for the fastening pin, while the others function as passages for the solution. The rod in FIG. 8 is more simplified in structure in comparison with the one in FIG. 6.

It is not advisable to cover a rod having a plurality of slots with a net so as to allow a free passage of the solution because membranes of the solution (especially the first solution) will be formed, covering the rod, due to surface tension, and prevent the passage of the second solution.

While there have been described several preferred embodiments of this invention, it will be understood by those skilled in the art that various modifications and changes are possible without departing from the spirit and scope of the invention. 7

What we claim is:

l. A combination of a rod and a fastening pin specifically designed for use in conjunction with said rod for use in cold permanent waving, the rod having a substantially hollow cylindrical shape and a plurality of slots circumferentially spaced in the proximity of both tips thereof, and the fastening pin having an elastically deformable neck, a leg extending from the neck, and a dent formed at the connecting portion of the neck and the leg, with the leg of the fastening pin penetrating into the rod in a direction perpendicular to the longitudinal axis of the rod through the slots and the dent in the fastening pin engaging elastically the tip of the rod, thereby fixing the pin to the rod.

2. The combination as defined in claim 1 wherein the outer diameter of the rod at both tips decreases gradually toward the center of the body thereof.

3. The combination as defined in claim 1 wherein the rod is provided with a plurality of protrusions at both tips to prevent slippage.

4. The combination of claim 1 wherein a pair of long openings is provided at the center of the body of the rod.

5. The combination as defined in claim 1 wherein the rod is provided with a plurality of holes at the center of the body thereof.

6. The combination of claim 1 wherein the plurality of slots for the fastening pin is extended to the center of the body of the rod.

7. The combination of claim 1 wherein a number of pores is provided over the entire body of the rod.

8. The combination as defined in claim 1 wherein the rod is made of synthetic resins.

9. The combination as defined in claim 1 wherein the rod and the fastening pin are made of like materials. 

1. A combination of a rod and a fastening pin specifically designed for use in conjunction with said rod for use in cold permanent waving, the rod having a substantially hollow cylindrical shape and a plurality of slots circumferentially spaced in the proximity of both tips thereof, and the fastening pin having an elastically deformable neck, a leg extending from the neck, and a dent formed at the connecting portion of the neck and the leg, with the leg of the fastening pin penetrating into the rod in a direction perpendicular to the longitudinal axis of the rod through the slots and the dent in the fastening pin engaging elastically the tip of the rod, thereby fixing the pin to the rod.
 2. The combination as defined in claim 1 wherein the outer diameter of the rod at both tips decreases gradually toward the center of the body thereof.
 3. The combination as defined in claim 1 wherein the rod is provided with a plurality of protrusions at both tips to prevent slippage.
 4. The combination of claim 1 wherein a pair of long openings is provided at the center of the body of the rod.
 5. The combination as defined in claim 1 wherein the rod is provided with a plurality of holes at the center of the body thereof.
 6. The combination of claim 1 wherein the plurality of slots for the fastening pin is extended to the center of the body of the rod.
 7. The combination of claim 1 wherein a number of pores is provided over the entire body of the rod.
 8. The combination as defined in claim 1 wherein the rod is made of synthetic resins.
 9. The combination as defined in claim 1 wherein the rod and the fastening pin are made of like materials. 